The Australian tubeworm (Ficopomatus enigmaticus) is an invasive marine polychaete found in estuarine and coastal waters of the UK. First recorded in the mid-20th century, this species forms dense reef-like aggregations in brackish environments, attaching to hard substrates like rocks, docks, and pilings. These structures can alter habitats, impacting native species and water flow, while also posing challenges for infrastructure. The tubeworm thrives in nutrient-rich, warm waters and can tolerate a range of salinities, contributing to its success as an invader.